Reverse osmosis (RO) system has been effectively applied on a large scale throughout the world for the treatment of effluent and the polluted water. The Arab countries and some other affluent countries have the credit of successfully running such large scale plants without minding for the cost factor involved in such projects. Here the polluted effluent is treated using RO technology in order to remove the pollutants. The investigator has taken an attempt has been made to find out in the impact of Iron Industry Effluent and also to know about the quality of Iron Industry effluents after the treatment of using R O plant. Reverse osmosis has been successfully applied on a large scale for the treatment of effluent and the polluted water. In the present study the Iron Industry effluent are treated using RO plant and treatment can be recommended to all Iron Industries. The same reverse osmosis method can also be applied to other industry effluent